ARROW-6172 [Java] Provide benchmarks to set IntVector with different methods

We provide benchmarks to evaluate the performance of setting IntVector in 3 different ways:

through a value holder
through a writer
directly set the value through a set method

Closes apache#5042 from liyafan82/fly_0808_jdbc1 and squashes the following commits:

b19693b <liyafan82> ARROW-6172  Provide benchmarks to set IntVector with different methods

Authored-by: liyafan82 <fan_li_ya@foxmail.com>
Signed-off-by: Micah Kornfield <emkornfield@gmail.com>

Author: liyafan82

java/performance/src/test/java/org/apache/arrow/vector/IntBenchmarks.java

@@ -0,0 +1,111 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.arrow.vector;
+
+import java.util.concurrent.TimeUnit;
+
+import org.apache.arrow.memory.BufferAllocator;
+import org.apache.arrow.memory.RootAllocator;
+import org.apache.arrow.vector.complex.impl.IntWriterImpl;
+import org.apache.arrow.vector.holders.NullableIntHolder;
+
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.Setup;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.annotations.TearDown;
+import org.openjdk.jmh.runner.Runner;
+import org.openjdk.jmh.runner.RunnerException;
+import org.openjdk.jmh.runner.options.Options;
+import org.openjdk.jmh.runner.options.OptionsBuilder;
+
+/**
+ * Benchmarks for {@link IntVector}.
+ */
+@State(Scope.Benchmark)
+public class IntBenchmarks {
+
+  private static final int VECTOR_LENGTH = 1024;
+
+  private static final int ALLOCATOR_CAPACITY = 1024 * 1024;
+
+  private BufferAllocator allocator;
+
+  private IntVector vector;
+
+  @Setup
+  public void prepare() {
+    allocator = new RootAllocator(ALLOCATOR_CAPACITY);
+    vector = new IntVector("vector", allocator);
+    vector.allocateNew(VECTOR_LENGTH);
+    vector.setValueCount(VECTOR_LENGTH);
+  }
+
+  @TearDown
+  public void tearDown() {
+    vector.close();
+    allocator.close();
+  }
+
+  @Benchmark
+  @BenchmarkMode(Mode.AverageTime)
+  @OutputTimeUnit(TimeUnit.MICROSECONDS)
+  public void setWithValueHolder() {
+    for (int i = 0; i < VECTOR_LENGTH; i++) {
+      NullableIntHolder holder = new NullableIntHolder();
+      holder.isSet = i % 3 == 0 ? 0 : 1;
+      if (holder.isSet == 1) {
+        holder.value = i;
+      }
+      vector.setSafe(i, holder);
+    }
+  }
+
+  @Benchmark
+  @BenchmarkMode(Mode.AverageTime)
+  @OutputTimeUnit(TimeUnit.MICROSECONDS)
+  public void setIntDirectly() {
+    for (int i = 0; i < VECTOR_LENGTH; i++) {
+      vector.setSafe(i, i % 3 == 0 ? 0 : 1, i);
+    }
+  }
+
+  @Benchmark
+  @BenchmarkMode(Mode.AverageTime)
+  @OutputTimeUnit(TimeUnit.MICROSECONDS)
+  public void setWithWriter() {
+    IntWriterImpl writer = new IntWriterImpl(vector);
+    for (int i = 0; i < VECTOR_LENGTH; i++) {
+      if (i % 3 != 0) {
+        writer.writeInt(i);
+      }
+    }
+  }
+
+  public static void main(String [] args) throws RunnerException {
+    Options opt = new OptionsBuilder()
+            .include(IntBenchmarks.class.getSimpleName())
+            .forks(1)
+            .build();
+
+    new Runner(opt).run();
+  }
+}